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Nasa Earth Observatory

All articles tagged with #nasa earth observatory

earth-science1 month ago•7 min saved

Meltwater from Antarctic Giant Triggers South Atlantic Phytoplankton Bloom

A melting Antarctic iceberg, A-23A, released nutrient-rich meltwater as it drifted into warmer South Atlantic waters, fueling a large phytoplankton bloom detectable by NASA satellites (VIIRS on Suomi NPP and the PACE mission). Scientists say light conditions and nutrients from iceberg melt promote bloom formation, with implications for the marine food web and carbon cycling; the duration and full ecological impact remain under study.

via NASA Science (.gov)|

#earth-science #iceberg-a-23a #nasa-earth-observatory

science1 month ago•4 min saved

Chesapeake Bay Ice Revisited: 1977 Freeze Echoes Today

NASA’s Earth Observatory recalls a historic Chesapeake Bay freeze captured by Landsat-1 in February 1977, when ice covered about 85% of the bay with notable thickness, and compares it to the 2025–2026 season’s roughly 38% coverage. The older images showed thick ice and fragmented areas that affected infrastructure and shellfish, while today’s conditions enable rare winter activities like ice boating and continue to challenge watermen and harbor facilities. The piece situates today’s freeze in the context of the region’s long record of extreme cold and ice conditions.

via NASA Science (.gov)|

#1977-winter #chesapeake-bay #ice-cover

science1 month ago•4 min saved

Home Reef Expands Amid Ongoing Eruptions, Growing Island in Tonga

NASA’s Earth Observatory reports that Home Reef, a mid-ocean volcano near Tonga, continued erupting from December 2025 into February 2026, expanding its land area by about 8 hectares as lava flows extended the island; satellite data from Landsat 8/9, MODIS, and VIIRS tracked growth and gas plumes, while authorities say the current activity poses low risk to nearby populations.

via NASA Science (.gov)|

#home-reef #landsat #nasa-earth-observatory